diff --git a/gcc/testsuite/gcc.target/aarch64/pr124078-1.c b/gcc/testsuite/gcc.target/aarch64/pr124078-1.c
new file mode 100644
index 00000000000..fa6f6bccacb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr124078-1.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -mbig-endian" } */
+
+/* PR rtl-optimization/124078 */
+
+
+int __attribute__((__vector_size__(8))) v;
+void foo(int a, int b) { v = (int __attribute__((__vector_size__(8)))){a,b}; }